''' Tools for working with systemd.

    The unit files in /etc/systemd/system have a higher precedence over unit
    files in /lib/systemd/system. Copy them from the latter to the former and
    customize it as per your requirements.
    
    http://fedoraproject.org/wiki/Systemd#How_do_I_set_automatic_login_on_a_virtual_console_terminal.3F
    http://fedoraproject.org/wiki/How_to_debug_Systemd_problems

    Reference:
    
    * http://linuxmanpages.net/manpages/fedora15/man5/systemd.unit.5.html
    * http://0pointer.de/blog/projects/systemd-for-admins-1.html
    * http://0pointer.de/blog/projects/systemd-for-admins-3.html
    * http://0pointer.de/blog/projects/the-new-configuration-files
    * http://fedoraproject.org/wiki/SysVinit_to_Systemd_Cheatsheet
    * http://www.dedoimedo.com/computers/systemd-blame.html
    * http://fedoraproject.org/wiki/Systemd
    * http://www.freedesktop.org/wiki/Software/systemd/FrequentlyAskedQuestions
    * https://wiki.archlinux.org/index.php/Systemd
    
'''
